Wrap-Up Exercise!

Which of the following refers to the different possible arrangements of objects where order is important?

• circular permutation

• combination

• permutation

• n-factorial

What do you call a product of a positive integer n

and all positive integers less than n?

• circular permutation

• n-factorial

• combination

• permutation

Which of the following is used to find the permutations

of n objects taken r at a time?

• n!

Which of the following formula is to be used in getting the number of combinations of n objects taken r at a time?

• n!

• n!

Which of the following describes an event that have no element in common?

• dependent

• independent

• mutually exclusive event

• not mutually exclusive event

Which of the following is the symbol used for intersection?

What term refers to game of chance?

• experiment

• probability

• outcome

• sample space

Which of the following formula illustrates a union of two events?

• P (A U B) = P(A) + P(B)

• P (A U B) = P(A) - P(B)   

• P (A U B) = P(A) + P(B) + P(AՈB)

• P (A U B) = P(A) + P(B) – P (AՈB)

Which of the following is the formula used to find the probability

of mutually exclusive events A and B?

• P (A U B) = P(A) + P(B)

• P (A U B) = P(A) - P(B)   

• P (A U B) = P(A) + P(B) + P(AՈB)

• P (A U B) = P(A) + P(B) – P (AՈB)